inji is basically quite unique where posts can be created off-chain but supercharged with Hive. Also, you can just interact with Hive posts/comments etc. directly. Sounds difficult, but it isn't.

The 24h rule was the initial idea. Right now, it works with mana, where it "costs" 70% mana for a post and 35% for a comment. An account recharges 100% mana over a day automatically.